1/* 2 * Copyright (c) 2017-2019, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7#include <arch.h> 8#include <asm_macros.S> 9#include <common/bl_common.h> 10#include <el3_common_macros.S> 11 12 .globl bl2_entrypoint 13 .globl bl2_el3_run_image 14 .globl bl2_run_next_image 15 16func bl2_entrypoint 17 /* Save arguments x0-x3 from previous Boot loader */ 18 mov x20, x0 19 mov x21, x1 20 mov x22, x2 21 mov x23, x3 22 23 el3_entrypoint_common \ 24 _init_sctlr=1 \ 25 _warm_boot_mailbox=!PROGRAMMABLE_RESET_ADDRESS \ 26 _secondary_cold_boot=!COLD_BOOT_SINGLE_CPU \ 27 _init_memory=1 \ 28 _init_c_runtime=1 \ 29 _exception_vectors=bl2_el3_exceptions 30 31 /* --------------------------------------------- 32 * Restore parameters of boot rom 33 * --------------------------------------------- 34 */ 35 mov x0, x20 36 mov x1, x21 37 mov x2, x22 38 mov x3, x23 39 40 /* --------------------------------------------- 41 * Perform BL2 setup 42 * --------------------------------------------- 43 */ 44 bl bl2_el3_setup 45 46#if ENABLE_PAUTH 47 /* --------------------------------------------- 48 * Program APIAKey_EL1 and enable pointer authentication. 49 * --------------------------------------------- 50 */ 51 bl pauth_init_enable_el3 52#endif /* ENABLE_PAUTH */ 53 54 /* --------------------------------------------- 55 * Jump to main function. 56 * --------------------------------------------- 57 */ 58 bl bl2_main 59 60 /* --------------------------------------------- 61 * Should never reach this point. 62 * --------------------------------------------- 63 */ 64 no_ret plat_panic_handler 65endfunc bl2_entrypoint 66 67func bl2_run_next_image 68 mov x20,x0 69 /* --------------------------------------------- 70 * MMU needs to be disabled because both BL2 and BL31 execute 71 * in EL3, and therefore share the same address space. 72 * BL31 will initialize the address space according to its 73 * own requirement. 74 * --------------------------------------------- 75 */ 76 bl disable_mmu_icache_el3 77 tlbi alle3 78 bl bl2_el3_plat_prepare_exit 79 80#if ENABLE_PAUTH 81 /* --------------------------------------------- 82 * Disable pointer authentication before jumping 83 * to next boot image. 84 * --------------------------------------------- 85 */ 86 bl pauth_disable_el3 87#endif /* ENABLE_PAUTH */ 88 89 ldp x0, x1, [x20, #ENTRY_POINT_INFO_PC_OFFSET] 90 msr elr_el3, x0 91 msr spsr_el3, x1 92 93 ldp x6, x7, [x20, #(ENTRY_POINT_INFO_ARGS_OFFSET + 0x30)] 94 ldp x4, x5, [x20, #(ENTRY_POINT_INFO_ARGS_OFFSET + 0x20)] 95 ldp x2, x3, [x20, #(ENTRY_POINT_INFO_ARGS_OFFSET + 0x10)] 96 ldp x0, x1, [x20, #(ENTRY_POINT_INFO_ARGS_OFFSET + 0x0)] 97 eret 98endfunc bl2_run_next_image 99